Wye or Delta Systems DS9181 (CSA Approved)

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2 6- High-resistance Grounding Equipment Wye or Delta Systems DS98 (CSA Approved) 0, 0, 600 Volts WHERE TO USE The function of a high-resistance grounding equipment is:. To provide a ground for neutral of an ungrounded three-phase power system, utilizing the high-resistance method. Using this equipment allows the system to operate basically as an ungrounded system. The equipment is designed to eliminate the danger of high transient overvoltages during certain types of ground faults. NOTE: The use of high-resistance grounding on 600-volt maximum systems precludes line-to-neutral loading.. To provide an immediate warning when the frst ground fault occurs through an alarm system. 3. To provide a method for quickly locating and removing the fault before another fault develops on another phase, thereby preventing circuit outages due to double line-to-ground faults. This is done by using the pulsing ground current feature and portable detector. Equipment Range Taps are provided on the standard DS98 grounding resistor to adjust for a system charging current maximum of 3.5 amps or less. Since the normal charging current for most 600-volt or less systems is usually below one ampere, our standard equipment is adequate; however, for systems with greater charging currents refer to the Company. Data for estimating the system charging current is shown in GEI DESCRIPTION OF OPERATION OF STANDARD EQUIPMENT LOW VOLTAGE The circuits used for low-voltage systems are shown in Fig. and Fig.. During normal conditions, with no ground fault on the system, only a small magnetizing current (capacitance-charging current) fows in the grounding transformers and no voltage appears across the resistor. When a ground fault occurs, the resistor limits the ground current to a low value. Taps are provided on the resistor to adjust the magnitude of the ground current in the range of 0.9 to 3.6 amperes, depending on the size of the system, so that the current supplied by the resistor to a ground fault will be slightly greater than the system s natural capacitance-charging current. The voltage appearing across the resistor will be sensed by the meter relay. Auxiliary contacts in the control, operated by the meter relay, are available for remote indication and annunciation of a ground. A green indicating light on the equipment indicates the control voltage is available and that the system is normal. When a fault develops, a red indicating light on the equipment will light and remain lighted until the ground fault is removed. To trace the ground fault, the operator turns the selector switch to the pulse position. This initiates cycle timing, alternately energizing and de-energizing a shorting contactor at the secondary resistor, resulting in a rhythmic fuctuation in the magnitude of the ground current. The portable hook-on detector is then used to trace the fuctuations in ground current through the system to the point of fault. After the ground point has been located and removed from the system, the operator then resets the selector switch to de-energize the pulse-cycle timing circuits. The grounding transformer for delta systems will consist of three single-phase transformers connected wye-delta. For wye systems, where system neutral is available, these grounding transformers are not needed. Fig volts maximum wye systems Fig volts maximum delta systems

3 High-resistance Grounding Equipment 6-3 Wye or Delta Systems DS98 0, 0, 600 Volts Fig. 3. DS98WB Type wall-mounted panel for 600-volt (max) wye or delta systems Fig. 4. DS98 Type CV foor-mounted panel for 600-volt (max) wye or delta systems SPECIFICATIONS Equipment Included in Standard 0-, 0-, or 600- volt Wye and Delta Systems Line Isolator, three phase, interlocked with the door 3 Line fuses, 600 volts, 0 amp, interrupt 00,000 amps RMS symmetrical 3 Neutral deriving transformers, dry-type (delta system only) Control power transformer (CPT) Meter relay (double set point) Pulsing contactor, set to produce approximately 40 current pulsations per minute Neutral-grounding resistor (separately mounted), cont. rated Relay for pulsing contactor Control relay, with interlocks for remote alarm Ground Fault red indicating light Normal green indicating light Normal-Pulse selector switch TEST resistor TEST pushbutton (momentary type) Instruction plate on door Wall-mounted enclosure (foor mounted is optional) Portable ground-current detector with carrying case. (Optional must be ordered as a separate item.) X Control circuit operates from 0 volts supplied by secondary of CPT. X All connections to control and annunciator circuits wired to terminal boards X Cable entry from top or bottom X Optional Modifcations (See page 6-7.) Resistor is mounted inside DS98L foor-mounted panel. DIMENSIONS All dimensions in inches. Type (outline 73A367 Sh. ) Type 3 (outline 73A367 Sh. ) Approximate Weight Wye - pounds Delta pounds Approximate Weight Wye - 75 pounds Delta pounds Fig. 5. Dimensions and weights of DS98W (0-, 0- or 600 volt, wye or delta systems) in wall-mounted enclosure

4 6-4 High-resistance Grounding Equipment Wye or Delta Systems DS98 00, 0 Volts Equipment Range Taps are provided on the standard usually below this, our standard equipment DS98 grounding resistor to adjust for a is adequate; however, for systems with system charging current maximum of 5.8 greater charging currents refer to Comamps or less (maximum 3.3 amps or less for pany. Data for estimating the system charg- 0 volts delta). Since the normal charging ing current is shown in GEI current for most 0-volt or less systems is DESCRIPTION OF OPERATION OF STANDARD EQUIPMENT HIGH VOLTAGE The system operation is the same as was described for the 600-volt (max) systems. One line diagrams for 00- or 0-volt systems are as shown in Fig. 9 and 0. Taps are provided on the secondary resistor to adjust the magnitude of the ground current, in the range of to 6 amperes (. to 3.5 amperes on 0-volt delta). The re- SPECIFICATIONS sistor tap value should be set slightly higher than the system s natural capacitance-charging current. For example, if the system ca- pacitance-charging current is measured at.9 amperes, the resistor taps should be set for approximately amperes ground cur- rent, with a periodic increase during puls- ing to 4 amperes. Equipment included in standard 00- or 0-volt wye and delta systems: Draw-out line isolator with line fuse (3 fuses for delta system) Grounding transformer, dry-type (3 for delta system) Meter relay Door switch (DSW) Pulsing contactor, set to produce approximately 40 current pulsations per minute Neutral-grounding resistor (mounted on top of panel or separately mounted), cont. rated Relay for pulsing contactor Control relay, with interlocks for remote alarm Control-power disconnect switch Control fuses Ground Fault red indicating light Normal green indicating light Normal-Pulse selector switch TEST pushbutton (momentary type) Instruction plate on door Floor-mounted enclosure (wall mounted not available) Portable ground-current detctor with carrying case. (Optional must be ordered as a separate item.) X Control circuit operates from remote source supplied by purchaser X All connections to control and annunciator circuits wired to terminal boards X Cable entry from top or bottom X Optional modifcations (See Table 6, page 6-8 for description.) Fig. 6. DS98, 0-volt delta system in Type foormounted enclosure with resistors mounted on top Fig. 7. DS98, 0-volt delta system, panel doors open, with resistors mounted on top Fig. 8. DS98, 0-volt delta system, in Type 3 foormounted enclosure

5 High-resistance Grounding Equipment 6-5 Wye or Delta Systems DS98 00, 0 Volts DESCRIPTION OF OPERATION (Cont d) DIMENSIONS Fig or 0-volt wye systems Voltage Encl Type D (In Inches) Net Weight (lbs) Wye Delta Wye Delta 00, , A Resistors may be mounted separate. See Table 3, page 6-7. B Incoming terminal connection C Recommended position for incoming power conduit Fig.. Dimensions of DS98HA or HC (00- or 0-volt wye or delta systems) Fig or 0-volt delta systems

6 } 6-6 High-resistance Grounding Equipment Wye or Delta Systems DS98 0, 0, 600, 00, 0 Volts Ground-current Detector* (Cat # 5A006P) TABLE 0-, 0-, and 600-volt systems Standard wall-mounted panels The ground-current detector is a modifed portable hook-on type ammeter and includes the following special features: Description Multi-range switch. Catalog Number DS98W Large window, suitable for conduits up to 5 inches nominal PANEL TYPE } diameter. Standard, with pulser A Removable arm to facilitate use in limited spaces where conduits are closely adjacent. with pulser C Standard, without pulser B-Use A form NEC/Calif Code, Shorting switch to provide transient protection while detector NEC/Calif Code, is being positioned around conductors. without pulser D-Use C form Closed magnetic core to minimize effects of stray felds. SYSTEM TYPE For use on systems rated up to 0 volts nominal, the handle Delta, 60 Hertz DO Wye, 60 Hertz Y is insulated making it suitable for use where cables are not in Delta, 50 Hertz OBS conduit. Wye, 50 Hertz OBS * Minimum quantity one () required at the installation site. SYSTEM VOLTAGE AND RELAY MODIFICATIONS Fig.. Portable detector with carrying case HOW TO ORDER DS98 SYSTEMS (See TABLES -6) Order by complete DS98 catalog number. EXAMPLE: Quantity Type wall-mounted panel with pulser for 0-volt wye, 60-Hertz system. Order DS98WAY08BXX (from TABLE ) (includes grounding resistor in NEMA enclosure for separate mounting) and order DS98 Cat. No. 5A006P ground-current detector with carrying case each from TABLE 4). 0-volt, Standard 0 0-volt UV 0-Use 04 form 0-volt TR 03-Use 04 form 0-volt UV TR 04 0-volt, Standard 08 0-volt UV 09-Use form 0-volt TR 0-Use form 0-volt UV TR 600-volt, Standard volt UV 6-Use 8 form 600-volt TR 7-Use 8 form 600-volt UV TR 8 RESISTOR MOUNTING For separate mounting and wiring by Customer. (Cannot be mounted inside or on top of Panel) B TYPE OF ENCLOSURE FOR RESISTOR Open (no enclosure) X Indoor Cover Outdoor Weatherproof 3 MODIFICATIONS None (standard) XX AM & separate mounted CT (Delta form only) AM Holding relay, reset push button, AM, CT (Wye form only) HM EQUIPMENT ENCLOSURES Type Type 3 3 Type C See TABLE 6 for description of Modifcations. For dimensions of wall-mounted panels see Fig. 5, page 6-3. Approximate dimensions of resistor: W D H Open (Fig. 3, Part, page 3-) Indoor Cover (Fig. 3, Part, Note, page 3-0) Outdoor Weatherproof (Fig., Part, Page 3-)

7 } } } } High-resistance Grounding Equipment 6-7 Wye or Delta Systems DS98 HOW TO ORDER (Cont d) TABLE 0-, 0-, and 600-volt systems Optional foor-mounted panels Description Catalog Number DS98L PANEL TYPE Standard, with pulser A Standard, without pulser B-OBSOLETE Use A form NEC/Calif Code, with pulser* C NEC/Calif Code, without pulser* D-OBSOLETE Use C form SYSTEM TYPE Delta, 60 Hertz Wye, 60 Hertz Delta, 50 Hertz Wye, 50 Hertz D0 Y D-OBSOLETE Y3-OBSOLETE SYSTEM VOLTAGE AND RELAY MODIFICATIONS* 0-volt, Standard 0 0-volt UV 0-Use 04 form 0-volt TR 03-Use 04 form 0-volt UV TR 04 0-volt, Standard 08 0-volt UV 09-Use form 0-volt TR 0-Use form 0-volt UV TR 600-volt, Standard volt UV 6-Use 8 form 600-volt TR 7-Use 8 form 600-volt UV TR 8 RESISTOR MOUNTING Mounted and wired inside equipment enclosure MODIFICATIONS* None (standard) CT and AM Holding Relay, Reset push button, Ammeter, CT (Wye form only) EQUIPMENT ENCLOSURES Type CV Type 3 CV Type CV Approximate Dimensions and Weights Equipment Enclosure Type CV Type 3CV Type CV AX XX AM HM W 3 D 3 H With Pulser Without Pulser (In Inches) In Pounds In Pounds Wye Delta Wye Delta FOOTNOTES FOR TABLES &3 * See TABLE 6 for description of modifcations. CV is convection cooled. Wall-mounted enclosure not available for 00- and 0-volt applications. Refer to Company for dimensions. Resistor is for separate mounting and wiring by Customer. l Refer to Fig., page 6-5, for dimensions and weights. 3 C 0, 0, 600, 00, 0 Volts TABLE and 0-volt systems Standard foor-mounted panels with pulser Description Catalog Number DS98H PANEL TYPE Standard, with pulser A NEC/Calif Code, with pulser C SYSTEM TYPE Delta, 60 Hertz Wye, 60 Hertz Delta, 50 Hertz Wye, 50 Hertz D0 Y D-OBSOLETE Y3-OBSOLETE SYSTEM VOLTAGE AND RELAY MODIFICATIONS* 00-volt, Standard 0 00-volt UV 0-Use 04 form 00-volt TR 03-Use 04 form 00-volt UV TR 04 0-volt, Standard 08 0-volt UV 09-Use form 0-volt TR 0-Use form 0-volt UV TR 3300-volt, Standard 5-OBSOLETE 3300-volt UV 6-OBSOLETE 3300-volt TR 7-OBSOLETE 3300-volt UV TR 8-OBSOLETE RESISTOR MOUNTING Panel mounted (on top in own enclosure) Shipped separate in own enclosure TYPE OF ENCLOSURE FOR RESISTOR Open (no enclosure all systems) 0 Type (0 volts wye) Type 3 (0 volts wye) Type (0 volts delta, 00 volts wye or delta) 3 Type 3 (0 volts delta, 00 volts wye or delta) 4 MODIFICATIONS* Holding Relay, Reset push button, Ammeter, CT None (standard) CT and AM A B HM XX AM EQUIPMENT ENCLOSURES l Type Type 3 3 Type C TABLE 4 Ground-current detector (modifed portable hook-on type ammeter) and carrying case Cat. No. Maximum System Voltage 5A006P 0 TABLE 5 (Description of modifcations applicable to all panels) Mod. Item Function UV Undervoltage Relay Drops out on low voltage and provides auxiliary contacts for meter relay failure remote alarm. TR Timing Relay Prevents nuisance tripping on temporary transient faults. NEC/Calif. Code Door Switches Allows panel to meet California Code and NEC. CT Current Transformer Detects ground current AM Ammeter Indicates ground current

8 6-8 Neutral Grounding Resistors Type DS300C Stainless-steel Neutral Grounding Resistors WHERE TO USE Use for resistance grounding of industrial power systems. Connect between ground and neutral of wye-wound transformers or generators. Neutral grounding resistors are rated in line-to-neutral voltage, initial current amperes and allowable-time-on. The line-toneutral voltage corresponds to the system s voltage divided by.73. The initial current is the current which would fow if rated voltage were present and resistance not affected by temperature rise. Listed neutral grounding resistors are designed, tested, and rated in accordance with IEEE Standards No Typical grounding resistor schematic SERVICE REQUIREMENTS The two classes of service requirements for neutral grounding resistors, as established by IEEE Standard 3-97, are steady state and rated time. RATED TIME Ten-second Rating This is the shortest time rating applied to neutral grounding devices which are used to reduce the ground current that may fow through a piece of equipment. The current permitted is usually considerably greater than the fullload current, so that dependence must be placed upon the relay operation to prevent damage not only to the neutral device but also to the main equipment. One-minute Rating A common use of neutral grounding devices has been to limit ground currents on outgoing feeders during faults to ground in order to reduce damage at the fault, limit overvoltages between sound phases and ground, and improve voltage regulation. Extended-time Rating For all applications where a ground fault is permitted to persist for longer than ten minutes, the grounding device should have a rating based upon the temperature reaching a constant maximum value, but selected on the basis that such operation will be infrequent. The temperature rise permitted may be higher than the standard temperature rise for steady-state service, assuming that operations at maximum temperature will not be required for more than an average of 90 days per year with an average ambient not exceeding 30 C. STEADY STATE The IEEE standards have established for the continuous-current-rated neutral grounding resistors an allowable temperature rise of 385 C under steady-state conditions. For the extended-time rating, a temperature rise of 60 C is permitted for stainless-steel resistors. Thus, if the lower temperature rise is desired for stainlesssteel-type resistors or if the resistor is to be on for an average above 90 days per year, a steady-state rating should be specifed. Mine Service Requirements Where neutral grounding resistors have been specifed for mining service applications, the Department of the Interior, Bureau of Mines-Mandatory Safety Standards for Coal Mines, sections and , specifes that the ground fault current rating of grounding resistors shall meet the extended time rating set forth in AIEE #3 (IEEE #3-97). Therefore, an extended time rating should be specifed for such applications. Seismic Shock Requirements Where the application requires the neutral grounding resistor to be rated for seismic shock, specifc requirements in terms of magnitude and frequency of the vibration should be obtained. Hazardous Location Requirements In areas where fre or explosion hazards may exist, the temperature rises allowed by IEEE-3-97 are likely to exceed the ignition temperature of the gas or vapor involved. It will be necessary to refer requests for neutral grounding resistors for hazardous locations to the company for a quotation, specifying the ignition temperature in degrees celsius of the gas or vapor involved. Resistors will be designed for a maximum operating temperature of the resistive element not to exceed 80 percent of the ignition temperature. Altitudes above 3300 Ft (000 M) Resistors listed in this section are designed and rated for use at altitudes not exceeding 3300 ft (000 M). For applications at higher altitudes, it will be necessary to refer to the company for a quotation. Resistance Tolerance The listed 85A and DS300C resistors are manufactured to a resistance tolerance of plus or minus 0 percent of the nominal furnished value. Rated Current The rated current for a neutral grounding resistor is the initial value of current, assuming a constant voltage is applied to the resistor. Resistors with ten-second, 60-second or extended-time rating have zero (0) continuous-duty-current rating. Tests Standard factory tests performed on the 85A and DS300C resistor consist of resistance measurement and applied potential tests only in accordance with routine tests as defned by IEEE-3-97, Sections 0..4 and 0.3. (second paragraph), respectively. EQUIPMENT DESCRIPTION DS300C Stainless-steel Resistors (Open frame) DS300C neutral grounding resistors consist of ceramic-core ribbon-wound units arranged in tiers within an open frame. (Fig. ). Each unit is insulated from the tier structure. For systems above 600 volts, the frame assembly is supported on ANSI-70 gray insulators rated 7.5 kv or higher to provide insulation from ground. The standard frame is constructed of hot dipped galvanized steel with zinc plated hardware. (Optional frame constructions available are aluminum or stainless steel, each with stainlesssteel hardware. Refer to company for quotation.) Fig. 7. DS300C stainless-steel resistor in open frame with support insulators DS300C Stainless-steel Resistors (Open Frame) (Cont d) Line and ground connections on DS300C resistor are external to frame and consist of through-stud-type entrance bushings with 5/8-inch - stud. For systems with line-to-neutral, voltages greater than 0 volts, resistor will consist of two or more frames. Frames may be stacked (-high frames maximum) for most 0- and 60-second ratings. DS300C open resistors can be installed indoors or outdoors. No weather-protective enclosure is required. Support insulators are shipped separately to prevent breakage in transit. See page 4-3 for principal characteristics.

9 Neutral Grounding Resistors 6-9 Type DS300C Stainless-steel Neutral Grounding Resistors (Cont d) EQUIPMENT DESCRIPTION (Cont d) DS300C Resistor with Bolt-on Ventilated Covers Bolt-on ventilated covers (attached to all six sides of the resistor frame) are intended to protect the resistor from falling objects, and prevent entry of birds and rodents. Cover plates are furnished for the lifting holes in the resistor frame. The ventilated covers are constructed of hot dipped galvanized steel with 0.-inch 3.50-inch rectangular openings spaced 0.-inch apart, providing approximately 49-percent opening for ventilation. Refer to Fig. 8. Fig. 8. DS300C neutral-grounding resistor with ventilated covers attached to frame DS300C Resistor with Grounded Safety-screen Enclosures For indoor or outdoor pad-mounted applications on systems rated greater than 600 volts line-to-line, the DS300C open frame resistor with grounded safety-screen enclosure should be used to provide for personnel safety (Refer to Fig. 9). Fig. 9. DS300C resistor in grounded safety-screen enclosure The open frame resistor is then surrounded at top and 4 sides by a self-supporting screen enclosure that provides adequate electrical clearance from the resistor frame based on system voltage. The safety enclosure is bolted to the foor (on concrete pad) by purchaser. There is no bottom screen. Sides are removable for customer access. The screens are constructed of galvanized expanded metal with.-inch by.6-inch diamond-shaped openings. Entrance of the purchaser s incoming neutral connection is normally made through the top screen utilizing an optional stud-type entrance bushing. (Refer to TABLE, page 4-0.) Stands DS300C Resistor Stand Resistor mounting stands are structures which elevate the resistor frame (frames) above ground level and can be used to provide personnel safety (refer to Fig. 0). The stand provides support for the resistor and is available with either 4-foot or optional 8-foot legs. The standard offering is a stand assembly made with steel angle legs and support members which are hot dipped galvanized steel for outdoor service. The top of the stand is covered with galvanized welded-wire screening. The stand includes a grounded safetyscreen enclosure. Standard enclosure is galvanized expanded-metal construction (as previously described). All stands with the grounded safety enclosure include mounting provisions on the top screen for one entrance bushing, one stand-off insulator and one JKW current transformer, each rated up to 5 kv. The current transformer may be mounted outside on the top screen or suspended from the top screen inside the enclosure (Refer to Fig. 3 and 3). Stands with 4-foot legs always include the grounded safety enclosure to provide personnel protection, because the closest electrical live point would be a maximum of 4 feet 9 inches above ground level. All stands and safety enclosures are bolted construction. All stands are shipped partially assembled. Safety enclosures used with the stands may be shipped completely unassembled or assembled (depending on size). DS300C Entrance Bushing Entrance bushings are available for mounting on top screen of pad-mounted or stand-mounted safety enclosures to allow Fig. 0. Stand with 4-foot legs and grounded galvanized safety-screen enclosure for means of connecting customer s incoming neutral conductor to the resistor. These ANSI-70 light gray bushings are assembled through stud type rated 400 amperes continuous, which is adequate for use with all catalog-listed DS300C resistors. Optional universal clamp-type terminal assembly for entrance bushing is available for use with copper or aluminum cable from Size # to 600 MCM. DS300C Current Transformers (CT) JKW wound-type current transformers are available for applications up to 5 kv maximum with a maximum ratio of 800:5 for JKW-3 (5 kv) and JKW-4 (8.7 kv) and 00:5 for JKW-5 (5 kv). These current transformers may be used indoors or outdoors without a weather-protective enclosure. The bottom insulators for resistor frame are commonly referred to as stand-off insulators or support insulators and are included in the price of the resistor. DS300C Resistor Terminations Type DS300C resistors are supplied with line and ground connection points external to the frame consisting of through stud type entrance bushings with 5/8-inch - copper studs. DS300C Cabling Where the resistor rating requires two frames or more and the frames are stacked, the connection between frames is included. Where the rating requires two or more frames that are not stackable (such as extended time ratings), the connection between frames must be supplied by purchaser. Cabling to and from entrance bushing and current transformer must also be supplied by the purchaser.

10 6-0 Neutral Grounding Resistors Type DS300C Stainless-steel Neutral Grounding Resistors (Cont d) Specifcations DS300C Stainless-steel Resistors Characteristic or Property RESISTANCE MATERIAL a. Short time rating 0 minutes or below b. Extended time ratings TEMPERATURE RISE (in accordance with IEEE-3 Standards). 30 C ambient a. Short time ratings b. Extended time ratings* c. Continuous ratings TEMPERATURE COEFFICIENT OF RESISTANCE CHANGE IN RESISTANCE WITH TEM- PERATURE (over the Operating Temperature Range) a. Short time ratings b. Extended time ratings Per IEEE-3 CORROSION RESISTANCE RESISTANCE TOLERANCE DS300C Stainless-steel Type a. AISI-430 chrome stainless steel or AISI-406 iron, chromium, stainless steel as determined by rating b. AISI-406 iron, chromium, aluminum, stainless steel a. 760 C rise b. 60 C rise c. 385 C rise a. AISI b. AISI a. 90% increase b. 3% increase The stainless-steel type resistors are inherently corrosion resistant and virtually immune to progressive pitting and rusting. The ceramic insulators are not appreciably affected by exposure to condensation, dust and other foreign materials. These resistors may be used outdoors completely exposed to the weather without an enclosure. 6 0 percent

11 Neutral Grounding Resistors Type DS300C Stainless-steel Neutral Grounding Resistors 0-second Rating for Indoor or Outdoor Service Initial Total Resistance Ohms Current in Resistor Catalog Amperes Calculated Nominal Number DS300C Furnished 39 VOLTS LINE-TO-NEUTRAL (0-VOLT SYSTEM) 0-SECOND RATING A00p74A 39A00p70A 77 VOLTS LINE-TO-NEUTRAL (0-VOLT SYSTEM) 0-SECOND RATING A00p7A 77A00p633A 77A400p70A 390 VOLTS LINE-TO-NEUTRAL (00-VOLT SYSTEM) 0-SECOND RATING A00p3B 390A00p6B 390A300p0B 390A400p08B 390A500p60B 390A600pB 00 VOLTS LINE-TO-NEUTRAL (0-VOLT SYSTEM) 0-SECOND RATING Ap435C 00A50p43C 00A00p37C 00A00p67C 00A300p7C 00A400p3C 00A500p65C 00A600p7C 00A800p74C 00A000p3C 00A00p377C 00A600p430C 00A000p9C 0 VOLTS LINE-TO-NEUTRAL (700-VOLT SYSTEM) 0-SECOND RATING Ap9C 0A50p433C 0A00p37C 0A00p77C 0A300p7C 0A400p3C 0A500p75C 0A600p7C 700 VOLTS LINE-TO-NEUTRAL (,470-VOLT SYSTEM) 0-SECOND RATING A00p3G 700A00p75G 700A300pG 700A400p0G 700A500p7G 700A600pG 700A800p336G 700A000p333G 8000 VOLTS LINE-TO-NEUTRAL (3,900-VOLT SYSTEM) 0-SECOND RATING * If resistor open frame, insert A in this space. If resistor with bolt-on covers, insert B in this space A00p37G 8000A00p77G 8000A300p7G 8000A400pG 8000A500p74G 8000A600pG 8000A800p83G 8000A000p335G 8000A00p386G 8000A600pG 8000A000pG Number of Frames Fig. No Dimensions Part No Enclosure or Stand Group Number

12 6- Neutral Grounding Resistors Type DS300C Stainless-steel Neutral Grounding Resistors MODIFICATIONS DS30 Enclosures and/or Stands and Accessories Using TABLE below, select complete DS30 catalog number for enclosure and/or stand assembly and accessories required for the application. (When an enclosure and/or stand assembly is selected from TABLE, a complete DS30 catalog number is required. Refer to pricing example on page 4-3.) TABLE Enclosures, Stands and Accessories Catalog Number DS30 TYPE OF ENCLOSURE OR STAND Galvanized safety-screen enclosure A Aluminum louvered safety enclosure B Galvanized-steel stand with 4 ft legs and galvanized safety screen enclosure For resistor - one frame or two frames stacked E For resistor - two frames side by side M Galvanized-steel stand with 8 ft. legs, and galvanized safety screen enclosure.... For resistor - one frame or frames stacked K Galvanized-steel stand with 8 ft. legs, no enclosure... For resistor - one frame or frames stacked H No enclosure, no stand N CURRENT TRANSFORMER FUNCTION Without CT mounting provisions... 0 With CT mounting provisions ENCLOSURE OR STAND GROUP NUMBER Insert group number from last column of resistor pricing tables, pages 4-4 to 4-8 here (Note: Price adder per group no. depends on type of enclosure or stand.) GROUP NUMBER TYPE OF ENCLOSURE OR STAND N or H A, E or K A, E or K 47,, A, E or K 30, A or M 33, A or M 35, 37, A or M... B B 47,, B ENTRANCE BUSHING AND STAND OFF INSULATORS None N Entrance bushing only: kv A 5.0 kv B { 3.0 kv C 34.5 kv D Stand-off Insulator only: kv... F 5.0 kv G { 3.0 kv H 34.5 kv J Entrance bushing and Stand-off Insulator: kv L 5.0 kv M { 3.0 kv P 34.5 kv R TERMINALS Cable lugs for resistors for Size # to 600 MCM cable None required lug lugs lugs lugs Cable or tube clamp for stand-off insulator None required for cable size #6-500 MCM or tube 8 - IPS for cable size #4/0-0 MCM or tube 4 - IPS... Entrance bushing terminal assembly for #-600 MCM cable None required Asm Asm Ground clamp for leg of stand None required for cable size #8 solid to #4 stranded for cable size #4 solid to #/0 stranded for cable size #/0 solid to #0 MCM for cable size 300 MCM to 500 MCM Ground lug for enclosure or stand (for cable size # to 600 MCM) CURRENT TRANSFORMER ( only) (Refer to TABLE for Form Letters. Selection of CT based on voltage and ratio.) None required (Form NN) kv class Type JKW-3 (Forms AA-AR) kv class Type JKW-4 (Forms BB-BR) kv class Type JKW-5 (Forms CA-CT)... * * * * *Insert TWO letter form. When ordering resistors only (open frame or with bolt-on cover) cable lugs may be ordered as a separate item. by Cat. No. 9A5970G.

13 Neutral Grounding Resistors 6-3 Type DS300C Stainless-steel Neutral Grounding Resistors DIMENSIONS (FOR ESTIMATING ONLY) All dimensions in inches. Outlines: 73A474-open frame 73A4733-with covers (600V) Dimensions Max. Weight Part in Inches Front (Lb) No. View Width B Height D Open With Frame Covers * E * E * E 0 0 4* E F F F F F F F F F F F 0 75 * These parts furnished with only mounting locations. Refer to Front View E. Insulation Class: 600 volts (max). Fig. 3. Dimensions and weights of DS300B 600-volt (maximum) resistors (open or with bolt-on covers) Outlines: open frame with covers (7.5KV) Dimension Max. Weight Part in Inches Front (Lb) No. View Width B Height D Open With Frame Covers E E E E F F F F F F F F F F F 85 These parts furnished with only support insulators. Refer to front view E. Insulation class: 7.5 kv (max). Fig.. Dimensions and weights of DS300C 7.5 kv single-frame resistors (open or with bolt-on covers)

14 6-4 Neutral Grounding Resistors Type DS300C Stainless-steel Neutral Ground Resistors DIMENSIONS (For Estimating Only) All dimensions in inches. Outlines: 73A478 - open frame 73A with covers (7.5KV) Outlines: 73A479 - open frame 73A with covers (5KV) Dimensions in Inches Max. Weight (Lb)* Dimensions in Inches Max. Weight (Lb)* Part. Part. No. Width B Height D E F Open With No. Frame Covers Width B Height D E F Open With Frame Covers * Weight of frame stack Fig.. Dimensions and weights of IC300B two-frame (stacked) 7.5 kv and 5 kv resistors (open or with bolt-on covers)

15 Neutral Grounding Resistors 6-5 Type DS300C Stainless-steel Neutral Grounding Resistors DIMENSIONS DS30 SAFETY-SCREEN ENCLOSURE Hot-dipped Galvanized Construction (A) DImensions in Inches Enclosure Part No. C DS30 Width Height JKW-3, 4 JKW-5 A0 A A045 A A0 A A047 A A0 A A049 A Max. Weight (Lb.) Fig. 6. Dimensions of grounded safety-screen enclosure for one- (stacked) resistors or two-frame (Fig. 7) DIMENSIONS DS30 GALVANIZED-STEEL STAND With Hot-dipped Galvanized Safety-screen Enclosure All dimensions in inches. Enclosure Part No. Dimensions in Inches DS30 AorB B* D E F 0, , , , , , * Refer to Figures and. Refer to company for DS300B mounting dimensions. Fig. 3. Dimensions of stand with grounded safety-screen enclosure for one-frame resistors and two-frame (stacked) resistors Stand Assembly Part No. DS30 E0, E K0, K E045, E45 K045, K45 E0, E K0, K E047, E47 K047, K47 E0, E K0, K E049, E49 K049, K49 Assembly Height E K Dimensions in Inches Width C Enclosure Height JKW-3, E Maximum Weight (Lb.) JKW-5 E K

16

17 Neutral Grounding Resistors 6-7 Type 85A Stainless-steel Neutral Grounding Resistors Description Catalog Number 85A SYSTEM VOLTAGE L-N 300 volts 3 00 volts 0 volts volts volts volts volts 00 TIME RATING 0 sec on time A extended time E continuous C 60 sec B 30 sec D CURRENT RATING 50 amps amps amps amps amps amps amps amps amps amps amps 000 ENCLOSURE TYPE Mill fnish Mx Painted fnish Px Hot dip galvanized fnish Hx Aluminum Ax Stainless steel Sx Standard enclosure xa Std enclosure with 4 ft stand xe Std enclosure with 6 ft stand xf Std enclosure with 8 ft stand xg BUSHINGS top bushing and bottom hub (basic version) top bushing and bottom hub (w/terminals) top and bottom bushings w/terminals 4 bottom entrance and exit with hubs 3 special per specifcations 9 CURRENT TRANSFORMERS none NN 5kv CT Ax 8.5kv ct Bx 5kv ct Cx 00:5 xk 00:5 xm 300:5 xn 400:5 xp 600:5 xq 800:5 xr 000:5 xs 00:5 xt heater, anti-condensation Hx special per specifcation Yx OTHER MODIFICATIONS none none Special Customer Nameplate Special Customer Drawings 3

18 6-8 Neutral Grounding Resistors Type 85A Stainless-steel Neutral Grounding Resistors Rating DIMENSIONS CATALOG NUMBER without CT with CT AMPS OHMS W D H W D H 390 Volts line to neutral (,400 volt system) 0 second rating A 3 A 50 MA NN A 3 A 00 MA NN A 3 A 00 MA NN A 3 A 300 MA NN A 3 A 400 MA NN A 3 A 500 MA NN A 3 A 600 MA NN A 3 A 800 MA NN A 3 A 000 MA NN Volts line to neutral (4,60 volt system) 0 second rating 50 85A A 50 MA NN A A 00 MA NN A A 00 MA NN A A 300 MA NN A A 400 MA NN A A 500 MA NN A A 600 MA NN A A 800 MA NN A A 000 MA NN A A 00 MA NN Volts line to neutral (7,00 volt system) 0 second rating A 4 A 50 MA NN A 4 A 00 MA NN A 4 A 00 MA NN A 4 A 300 MA NN A 4 A 400 MA NN A 4 A 500 MA NN A 4 A 600 MA NN A 4 A 800 MA NN A 4 A 000 MA NN A 4 A 00 MA NN Volts line to neutral (3,900 volt system) 0 second rating A 80 A 50 MA NN A 80 A 00 MA NN A 80 A 00 MA NN A 80 A 300 MA NN A 80 A 400 MA NN A 80 A 500 MA NN A 80 A 600 MA NN A 80 A 800 MA NN A 80 A 000 MA NN A 80 A 00 MA NN

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